add and document activated->include classes
introduce constdata parameter to config.json and merge it into the API configuration before vardata is loaded.
add A and T options to the testing Makefile
add bundle_options to the API and use them in the README.md files
set_hostname: work again with the single_use option
cf-dc-api.pl: add T, A, and FILTER options to the Makefile.  Add --activated, --test, and --filter options to cf-sketch.  Add runfile/filter_inputs option to config.json and document it.
cf-dc-api.pl: add bundle_options to bundle metadata
cf-sketch.pl: better error message when the parameters JSON file is invalid